NJG63-2/3-01
1983
lron ores in the Fen central complex, Telemark (S. Norway): Petrography, chemical evolution and conditions of equilibrium
63
2, 3
73-82

Hydrothennal iron ores from the Fen central complex may be classified according to their mineral assemblages as primary (magnetite ± pyrite ± anatase + calcite) or secondary (hematite ± goethite + calcite ± dolomite). Primary ores equilibrated between the hematite - magnetite and magnetite- pyrite - pyrrhotite buffers, at temperatures below 600°C. Alteration to form the secondary parageneses took place above the hematite - magnetite buffer, probably at lower temperatures.

0029-196X
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